X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=test%2FTransforms%2FInstCombine%2Fcast.ll;h=7fe54ef8469b784ac584071efab1e50f29bda13a;hb=b53f724f913f6db279795439a90ec83d6ee20ddd;hp=4fab92f2c11d0670e3ce0ab6e15a04d206f7bb94;hpb=f222ebe86c944fc0f13afbb619bfa69880893f7a;p=oota-llvm.git

diff --git a/test/Transforms/InstCombine/cast.ll b/test/Transforms/InstCombine/cast.ll
index 4fab92f2c11..7fe54ef8469 100644
--- a/test/Transforms/InstCombine/cast.ll
+++ b/test/Transforms/InstCombine/cast.ll
@@ -93,16 +93,36 @@ declare void @varargs(i32, ...)
 
 define void @test11(i32* %P) {
         %c = bitcast i32* %P to i16*            ; <i16*> [#uses=1]
-        call void (i32, ...)* @varargs( i32 5, i16* %c )
+        call void (i32, ...) @varargs( i32 5, i16* %c )
         ret void
-; CHECK: call void (i32, ...)* @varargs(i32 5, i32* %P)
+; CHECK: call void (i32, ...) @varargs(i32 5, i32* %P)
 ; CHECK: ret void
 }
 
+declare i32 @__gxx_personality_v0(...)
+define void @test_invoke_vararg_cast(i32* %a, i32* %b) personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
+entry:
+  %0 = bitcast i32* %b to i8*
+  %1 = bitcast i32* %a to i64*
+  invoke void (i32, ...) @varargs(i32 1, i8* %0, i64* %1)
+          to label %invoke.cont unwind label %lpad
+
+invoke.cont:                                      ; preds = %entry
+  ret void
+
+lpad:                                             ; preds = %entry
+  %2 = landingpad { i8*, i32 }
+          cleanup
+  ret void
+; CHECK-LABEL: test_invoke_vararg_cast
+; CHECK-LABEL: entry:
+; CHECK: invoke void (i32, ...) @varargs(i32 1, i32* %b, i32* %a)
+}
+
 define i8* @test13(i64 %A) {
-        %c = getelementptr [0 x i8]* bitcast ([32832 x i8]* @inbuf to [0 x i8]*), i64 0, i64 %A             ; <i8*> [#uses=1]
+        %c = getelementptr [0 x i8], [0 x i8]* bitcast ([32832 x i8]* @inbuf to [0 x i8]*), i64 0, i64 %A             ; <i8*> [#uses=1]
         ret i8* %c
-; CHECK: %c = getelementptr [32832 x i8]* @inbuf, i64 0, i64 %A
+; CHECK: %c = getelementptr [32832 x i8], [32832 x i8]* @inbuf, i64 0, i64 %A
 ; CHECK: ret i8* %c
 }
 
@@ -167,8 +187,8 @@ define i32 @test21(i32 %X) {
         %c2 = sext i8 %c1 to i32                ; <i32> [#uses=1]
         %RV = and i32 %c2, 255          ; <i32> [#uses=1]
         ret i32 %RV
-; CHECK: %c21 = and i32 %X, 255
-; CHECK: ret i32 %c21
+; CHECK: %c2.1 = and i32 %X, 255
+; CHECK: ret i32 %c2.1
 }
 
 define i32 @test22(i32 %X) {
@@ -199,15 +219,6 @@ define i1 @test24(i1 %C) {
 ; CHECK: ret i1 true
 }
 
-define void @test25(i32** %P) {
-        %c = bitcast i32** %P to float**                ; <float**> [#uses=1]
-        ;; Fold cast into null
-        store float* null, float** %c
-        ret void
-; CHECK: store i32* null, i32** %P
-; CHECK: ret void
-}
-
 define i32 @test26(float %F) {
         ;; no need to cast from float->double.
         %c = fpext float %F to double           ; <double> [#uses=1]
@@ -220,14 +231,14 @@ define i32 @test26(float %F) {
 define [4 x float]* @test27([9 x [4 x float]]* %A) {
         %c = bitcast [9 x [4 x float]]* %A to [4 x float]*              ; <[4 x float]*> [#uses=1]
         ret [4 x float]* %c
-; CHECK: %c = getelementptr inbounds [9 x [4 x float]]* %A, i64 0, i64 0
+; CHECK: %c = getelementptr inbounds [9 x [4 x float]], [9 x [4 x float]]* %A, i64 0, i64 0
 ; CHECK: ret [4 x float]* %c
 }
 
 define float* @test28([4 x float]* %A) {
         %c = bitcast [4 x float]* %A to float*          ; <float*> [#uses=1]
         ret float* %c
-; CHECK: %c = getelementptr inbounds [4 x float]* %A, i64 0, i64 0
+; CHECK: %c = getelementptr inbounds [4 x float], [4 x float]* %A, i64 0, i64 0
 ; CHECK: ret float* %c
 }
 
@@ -348,12 +359,30 @@ define i16 @test40(i16 %a) {
 ; PR1263
 define i32* @test41(i32* %tmp1) {
         %tmp64 = bitcast i32* %tmp1 to { i32 }*
-        %tmp65 = getelementptr { i32 }* %tmp64, i32 0, i32 0
+        %tmp65 = getelementptr { i32 }, { i32 }* %tmp64, i32 0, i32 0
         ret i32* %tmp65
 ; CHECK-LABEL: @test41(
 ; CHECK: ret i32* %tmp1
 }
 
+define i32 addrspace(1)* @test41_addrspacecast_smaller(i32* %tmp1) {
+  %tmp64 = addrspacecast i32* %tmp1 to { i32 } addrspace(1)*
+  %tmp65 = getelementptr { i32 }, { i32 } addrspace(1)* %tmp64, i32 0, i32 0
+  ret i32 addrspace(1)* %tmp65
+; CHECK-LABEL: @test41_addrspacecast_smaller(
+; CHECK: addrspacecast i32* %tmp1 to i32 addrspace(1)*
+; CHECK-NEXT: ret i32 addrspace(1)*
+}
+
+define i32* @test41_addrspacecast_larger(i32 addrspace(1)* %tmp1) {
+  %tmp64 = addrspacecast i32 addrspace(1)* %tmp1 to { i32 }*
+  %tmp65 = getelementptr { i32 }, { i32 }* %tmp64, i32 0, i32 0
+  ret i32* %tmp65
+; CHECK-LABEL: @test41_addrspacecast_larger(
+; CHECK: addrspacecast i32 addrspace(1)* %tmp1 to i32*
+; CHECK-NEXT: ret i32*
+}
+
 define i32 @test42(i32 %X) {
         %Y = trunc i32 %X to i8         ; <i8> [#uses=1]
         %Z = zext i8 %Y to i32          ; <i32> [#uses=1]
@@ -370,7 +399,7 @@ define zeroext i64 @test43(i8 zeroext %on_off) nounwind readonly {
 	ret i64 %C  ;; Should be (add (zext i8 -> i64), -1)
 ; CHECK-LABEL: @test43(
 ; CHECK-NEXT: %A = zext i8 %on_off to i64
-; CHECK-NEXT: %B = add i64 %A, -1
+; CHECK-NEXT: %B = add nsw i64 %A, -1
 ; CHECK-NEXT: ret i64 %B
 }
 
@@ -699,11 +728,11 @@ define %s @test68(%s *%p, i64 %i) {
 ; CHECK-LABEL: @test68(
   %o = mul i64 %i, 12
   %q = bitcast %s* %p to i8*
-  %pp = getelementptr inbounds i8* %q, i64 %o
-; CHECK-NEXT: getelementptr %s*
+  %pp = getelementptr inbounds i8, i8* %q, i64 %o
+; CHECK-NEXT: getelementptr %s, %s*
   %r = bitcast i8* %pp to %s*
-  %l = load %s* %r
-; CHECK-NEXT: load %s*
+  %l = load %s, %s* %r
+; CHECK-NEXT: load %s, %s*
   ret %s %l
 ; CHECK-NEXT: ret %s
 }
@@ -711,28 +740,28 @@ define %s @test68(%s *%p, i64 %i) {
 ; addrspacecasts should be eliminated.
 define %s @test68_addrspacecast(%s* %p, i64 %i) {
 ; CHECK-LABEL: @test68_addrspacecast(
-; CHECK-NEXT: getelementptr %s*
-; CHECK-NEXT: load %s*
+; CHECK-NEXT: getelementptr %s, %s*
+; CHECK-NEXT: load %s, %s*
 ; CHECK-NEXT: ret %s
   %o = mul i64 %i, 12
   %q = addrspacecast %s* %p to i8 addrspace(2)*
-  %pp = getelementptr inbounds i8 addrspace(2)* %q, i64 %o
+  %pp = getelementptr inbounds i8, i8 addrspace(2)* %q, i64 %o
   %r = addrspacecast i8 addrspace(2)* %pp to %s*
-  %l = load %s* %r
+  %l = load %s, %s* %r
   ret %s %l
 }
 
 define %s @test68_addrspacecast_2(%s* %p, i64 %i) {
 ; CHECK-LABEL: @test68_addrspacecast_2(
-; CHECK-NEXT: getelementptr %s* %p
+; CHECK-NEXT: getelementptr %s, %s* %p
 ; CHECK-NEXT: addrspacecast
-; CHECK-NEXT: load %s addrspace(1)*
+; CHECK-NEXT: load %s, %s addrspace(1)*
 ; CHECK-NEXT: ret %s
   %o = mul i64 %i, 12
   %q = addrspacecast %s* %p to i8 addrspace(2)*
-  %pp = getelementptr inbounds i8 addrspace(2)* %q, i64 %o
+  %pp = getelementptr inbounds i8, i8 addrspace(2)* %q, i64 %o
   %r = addrspacecast i8 addrspace(2)* %pp to %s addrspace(1)*
-  %l = load %s addrspace(1)* %r
+  %l = load %s, %s addrspace(1)* %r
   ret %s %l
 }
 
@@ -740,11 +769,11 @@ define %s @test68_as1(%s addrspace(1)* %p, i32 %i) {
 ; CHECK-LABEL: @test68_as1(
   %o = mul i32 %i, 12
   %q = bitcast %s addrspace(1)* %p to i8 addrspace(1)*
-  %pp = getelementptr inbounds i8 addrspace(1)* %q, i32 %o
-; CHECK-NEXT: getelementptr %s addrspace(1)*
+  %pp = getelementptr inbounds i8, i8 addrspace(1)* %q, i32 %o
+; CHECK-NEXT: getelementptr %s, %s addrspace(1)*
   %r = bitcast i8 addrspace(1)* %pp to %s addrspace(1)*
-  %l = load %s addrspace(1)* %r
-; CHECK-NEXT: load %s addrspace(1)*
+  %l = load %s, %s addrspace(1)* %r
+; CHECK-NEXT: load %s, %s addrspace(1)*
   ret %s %l
 ; CHECK-NEXT: ret %s
 }
@@ -753,11 +782,11 @@ define double @test69(double *%p, i64 %i) {
 ; CHECK-LABEL: @test69(
   %o = shl nsw i64 %i, 3
   %q = bitcast double* %p to i8*
-  %pp = getelementptr inbounds i8* %q, i64 %o
-; CHECK-NEXT: getelementptr inbounds double*
+  %pp = getelementptr inbounds i8, i8* %q, i64 %o
+; CHECK-NEXT: getelementptr inbounds double, double*
   %r = bitcast i8* %pp to double*
-  %l = load double* %r
-; CHECK-NEXT: load double*
+  %l = load double, double* %r
+; CHECK-NEXT: load double, double*
   ret double %l
 ; CHECK-NEXT: ret double
 }
@@ -767,11 +796,11 @@ define %s @test70(%s *%p, i64 %i) {
   %o = mul nsw i64 %i, 36
 ; CHECK-NEXT: mul nsw i64 %i, 3
   %q = bitcast %s* %p to i8*
-  %pp = getelementptr inbounds i8* %q, i64 %o
-; CHECK-NEXT: getelementptr inbounds %s*
+  %pp = getelementptr inbounds i8, i8* %q, i64 %o
+; CHECK-NEXT: getelementptr inbounds %s, %s*
   %r = bitcast i8* %pp to %s*
-  %l = load %s* %r
-; CHECK-NEXT: load %s*
+  %l = load %s, %s* %r
+; CHECK-NEXT: load %s, %s*
   ret %s %l
 ; CHECK-NEXT: ret %s
 }
@@ -781,41 +810,41 @@ define double @test71(double *%p, i64 %i) {
   %o = shl i64 %i, 5
 ; CHECK-NEXT: shl i64 %i, 2
   %q = bitcast double* %p to i8*
-  %pp = getelementptr i8* %q, i64 %o
-; CHECK-NEXT: getelementptr double*
+  %pp = getelementptr i8, i8* %q, i64 %o
+; CHECK-NEXT: getelementptr double, double*
   %r = bitcast i8* %pp to double*
-  %l = load double* %r
-; CHECK-NEXT: load double*
+  %l = load double, double* %r
+; CHECK-NEXT: load double, double*
   ret double %l
 ; CHECK-NEXT: ret double
 }
 
 define double @test72(double *%p, i32 %i) {
 ; CHECK-LABEL: @test72(
-  %so = mul nsw i32 %i, 8
+  %so = shl nsw i32 %i, 3
   %o = sext i32 %so to i64
 ; CHECK-NEXT: sext i32 %i to i64
   %q = bitcast double* %p to i8*
-  %pp = getelementptr inbounds i8* %q, i64 %o
-; CHECK-NEXT: getelementptr inbounds double*
+  %pp = getelementptr inbounds i8, i8* %q, i64 %o
+; CHECK-NEXT: getelementptr inbounds double, double*
   %r = bitcast i8* %pp to double*
-  %l = load double* %r
-; CHECK-NEXT: load double*
+  %l = load double, double* %r
+; CHECK-NEXT: load double, double*
   ret double %l
 ; CHECK-NEXT: ret double
 }
 
 define double @test73(double *%p, i128 %i) {
 ; CHECK-LABEL: @test73(
-  %lo = mul nsw i128 %i, 8
+  %lo = shl nsw i128 %i, 3
   %o = trunc i128 %lo to i64
 ; CHECK-NEXT: trunc i128 %i to i64
   %q = bitcast double* %p to i8*
-  %pp = getelementptr inbounds i8* %q, i64 %o
-; CHECK-NEXT: getelementptr double*
+  %pp = getelementptr inbounds i8, i8* %q, i64 %o
+; CHECK-NEXT: getelementptr double, double*
   %r = bitcast i8* %pp to double*
-  %l = load double* %r
-; CHECK-NEXT: load double*
+  %l = load double, double* %r
+; CHECK-NEXT: load double, double*
   ret double %l
 ; CHECK-NEXT: ret double
 }
@@ -823,11 +852,11 @@ define double @test73(double *%p, i128 %i) {
 define double @test74(double *%p, i64 %i) {
 ; CHECK-LABEL: @test74(
   %q = bitcast double* %p to i64*
-  %pp = getelementptr inbounds i64* %q, i64 %i
-; CHECK-NEXT: getelementptr inbounds double*
+  %pp = getelementptr inbounds i64, i64* %q, i64 %i
+; CHECK-NEXT: getelementptr inbounds double, double*
   %r = bitcast i64* %pp to double*
-  %l = load double* %r
-; CHECK-NEXT: load double*
+  %l = load double, double* %r
+; CHECK-NEXT: load double, double*
   ret double %l
 ; CHECK-NEXT: ret double
 }
@@ -839,7 +868,7 @@ define i32* @test75(i32* %p, i32 %x) {
   %z = sext i32 %y to i64
 ; CHECK-NEXT: sext i32 %y to i64
   %q = bitcast i32* %p to i8*
-  %r = getelementptr i8* %q, i64 %z
+  %r = getelementptr i8, i8* %q, i64 %z
   %s = bitcast i8* %r to i32*
   ret i32* %s
 }
@@ -850,11 +879,11 @@ define %s @test76(%s *%p, i64 %i, i64 %j) {
   %o2 = mul nsw i64 %o, %j
 ; CHECK-NEXT: %o2 = mul i64 %i, %j
   %q = bitcast %s* %p to i8*
-  %pp = getelementptr inbounds i8* %q, i64 %o2
-; CHECK-NEXT: getelementptr %s* %p, i64 %o2
+  %pp = getelementptr inbounds i8, i8* %q, i64 %o2
+; CHECK-NEXT: getelementptr %s, %s* %p, i64 %o2
   %r = bitcast i8* %pp to %s*
-  %l = load %s* %r
-; CHECK-NEXT: load %s*
+  %l = load %s, %s* %r
+; CHECK-NEXT: load %s, %s*
   ret %s %l
 ; CHECK-NEXT: ret %s
 }
@@ -866,11 +895,11 @@ define %s @test77(%s *%p, i64 %i, i64 %j) {
 ; CHECK-NEXT: %o = mul nsw i64 %i, 3
 ; CHECK-NEXT: %o2 = mul nsw i64 %o, %j
   %q = bitcast %s* %p to i8*
-  %pp = getelementptr inbounds i8* %q, i64 %o2
-; CHECK-NEXT: getelementptr inbounds %s* %p, i64 %o2
+  %pp = getelementptr inbounds i8, i8* %q, i64 %o2
+; CHECK-NEXT: getelementptr inbounds %s, %s* %p, i64 %o2
   %r = bitcast i8* %pp to %s*
-  %l = load %s* %r
-; CHECK-NEXT: load %s*
+  %l = load %s, %s* %r
+; CHECK-NEXT: load %s, %s*
   ret %s %l
 ; CHECK-NEXT: ret %s
 }
@@ -894,11 +923,11 @@ define %s @test78(%s *%p, i64 %i, i64 %j, i32 %k, i32 %l, i128 %m, i128 %n) {
   %h = mul nsw i64 %g, %j
 ; CHECK-NEXT: mul i64 %g, %j
   %q = bitcast %s* %p to i8*
-  %pp = getelementptr inbounds i8* %q, i64 %h
-; CHECK-NEXT: getelementptr %s* %p, i64 %h
+  %pp = getelementptr inbounds i8, i8* %q, i64 %h
+; CHECK-NEXT: getelementptr %s, %s* %p, i64 %h
   %r = bitcast i8* %pp to %s*
-  %load = load %s* %r
-; CHECK-NEXT: load %s*
+  %load = load %s, %s* %r
+; CHECK-NEXT: load %s, %s*
   ret %s %load
 ; CHECK-NEXT: ret %s
 }
@@ -911,63 +940,63 @@ define %s @test79(%s *%p, i64 %i, i32 %j) {
   %c = mul i32 %b, %j
   %q = bitcast %s* %p to i8*
 ; CHECK: bitcast
-  %pp = getelementptr inbounds i8* %q, i32 %c
+  %pp = getelementptr inbounds i8, i8* %q, i32 %c
   %r = bitcast i8* %pp to %s*
-  %l = load %s* %r
+  %l = load %s, %s* %r
   ret %s %l
 }
 
 define double @test80([100 x double]* %p, i32 %i) {
 ; CHECK-LABEL: @test80(
-  %tmp = mul nsw i32 %i, 8
+  %tmp = shl nsw i32 %i, 3
 ; CHECK-NEXT: sext i32 %i to i64
   %q = bitcast [100 x double]* %p to i8*
-  %pp = getelementptr i8* %q, i32 %tmp
-; CHECK-NEXT: getelementptr [100 x double]*
+  %pp = getelementptr i8, i8* %q, i32 %tmp
+; CHECK-NEXT: getelementptr [100 x double], [100 x double]*
   %r = bitcast i8* %pp to double*
-  %l = load double* %r
-; CHECK-NEXT: load double*
+  %l = load double, double* %r
+; CHECK-NEXT: load double, double*
   ret double %l
 ; CHECK-NEXT: ret double
 }
 
 define double @test80_addrspacecast([100 x double] addrspace(1)* %p, i32 %i) {
 ; CHECK-LABEL: @test80_addrspacecast(
-; CHECK-NEXT: getelementptr [100 x double] addrspace(1)* %p
-; CHECK-NEXT: load double addrspace(1)*
+; CHECK-NEXT: getelementptr [100 x double], [100 x double] addrspace(1)* %p
+; CHECK-NEXT: load double, double addrspace(1)*
 ; CHECK-NEXT: ret double
-  %tmp = mul nsw i32 %i, 8
+  %tmp = shl nsw i32 %i, 3
   %q = addrspacecast [100 x double] addrspace(1)* %p to i8 addrspace(2)*
-  %pp = getelementptr i8 addrspace(2)* %q, i32 %tmp
+  %pp = getelementptr i8, i8 addrspace(2)* %q, i32 %tmp
   %r = addrspacecast i8 addrspace(2)* %pp to double addrspace(1)*
-  %l = load double addrspace(1)* %r
+  %l = load double, double addrspace(1)* %r
   ret double %l
 }
 
 define double @test80_addrspacecast_2([100 x double] addrspace(1)* %p, i32 %i) {
 ; CHECK-LABEL: @test80_addrspacecast_2(
-; CHECK-NEXT: getelementptr [100 x double] addrspace(1)*
+; CHECK-NEXT: getelementptr [100 x double], [100 x double] addrspace(1)*
 ; CHECK-NEXT: addrspacecast double addrspace(1)*
-; CHECK-NEXT: load double addrspace(3)*
+; CHECK-NEXT: load double, double addrspace(3)*
 ; CHECK-NEXT: ret double
-  %tmp = mul nsw i32 %i, 8
+  %tmp = shl nsw i32 %i, 3
   %q = addrspacecast [100 x double] addrspace(1)* %p to i8 addrspace(2)*
-  %pp = getelementptr i8 addrspace(2)* %q, i32 %tmp
+  %pp = getelementptr i8, i8 addrspace(2)* %q, i32 %tmp
   %r = addrspacecast i8 addrspace(2)* %pp to double addrspace(3)*
-  %l = load double addrspace(3)* %r
+  %l = load double, double addrspace(3)* %r
   ret double %l
 }
 
 define double @test80_as1([100 x double] addrspace(1)* %p, i16 %i) {
 ; CHECK-LABEL: @test80_as1(
-  %tmp = mul nsw i16 %i, 8
+  %tmp = shl nsw i16 %i, 3
 ; CHECK-NEXT: sext i16 %i to i32
   %q = bitcast [100 x double] addrspace(1)* %p to i8 addrspace(1)*
-  %pp = getelementptr i8 addrspace(1)* %q, i16 %tmp
-; CHECK-NEXT: getelementptr [100 x double] addrspace(1)*
+  %pp = getelementptr i8, i8 addrspace(1)* %q, i16 %tmp
+; CHECK-NEXT: getelementptr [100 x double], [100 x double] addrspace(1)*
   %r = bitcast i8 addrspace(1)* %pp to double addrspace(1)*
-  %l = load double addrspace(1)* %r
-; CHECK-NEXT: load double addrspace(1)*
+  %l = load double, double addrspace(1)* %r
+; CHECK-NEXT: load double, double addrspace(1)*
   ret double %l
 ; CHECK-NEXT: ret double
 }
@@ -975,9 +1004,9 @@ define double @test80_as1([100 x double] addrspace(1)* %p, i16 %i) {
 define double @test81(double *%p, float %f) {
   %i = fptosi float %f to i64
   %q = bitcast double* %p to i8*
-  %pp = getelementptr i8* %q, i64 %i
+  %pp = getelementptr i8, i8* %q, i64 %i
   %r = bitcast i8* %pp to double*
-  %l = load double* %r
+  %l = load double, double* %r
   ret double %l
 }
 
@@ -1004,7 +1033,107 @@ define i64 @test83(i16 %a, i64 %k) {
   ret i64 %sh_prom1
 
 ; CHECK-LABEL: @test83(
-; CHECK: %sub = add nsw i64 %k, 4294967295
+; CHECK: %sub = add i64 %k, 4294967295
 ; CHECK: %sh_prom = trunc i64 %sub to i32
 ; CHECK: %shl = shl i32 %conv, %sh_prom
 }
+
+define i8 @test84(i32 %a) {
+  %add = add nsw i32 %a, -16777216
+  %shr = lshr exact i32 %add, 23
+  %trunc = trunc i32 %shr to i8
+  ret i8 %trunc
+
+; CHECK-LABEL: @test84(
+; CHECK: [[ADD:%.*]] = add i32 %a, 2130706432
+; CHECK: [[SHR:%.*]] = lshr exact i32 [[ADD]], 23
+; CHECK: [[CST:%.*]] = trunc i32 [[SHR]] to i8
+}
+
+define i8 @test85(i32 %a) {
+  %add = add nuw i32 %a, -16777216
+  %shr = lshr exact i32 %add, 23
+  %trunc = trunc i32 %shr to i8
+  ret i8 %trunc
+
+; CHECK-LABEL: @test85(
+; CHECK: [[ADD:%.*]] = add i32 %a, 2130706432
+; CHECK: [[SHR:%.*]] = lshr exact i32 [[ADD]], 23
+; CHECK: [[CST:%.*]] = trunc i32 [[SHR]] to i8
+}
+
+; Overflow on a float to int or int to float conversion is undefined (PR21130).
+
+define i8 @overflow_fptosi() {
+  %i = fptosi double 1.56e+02 to i8
+  ret i8 %i
+; CHECK-LABEL: @overflow_fptosi(
+; CHECK-NEXT: ret i8 undef 
+}
+
+define i8 @overflow_fptoui() {
+  %i = fptoui double 2.56e+02 to i8
+  ret i8 %i
+; CHECK-LABEL: @overflow_fptoui(
+; CHECK-NEXT: ret i8 undef 
+}
+
+; The maximum float is approximately 2 ** 128 which is 3.4E38. 
+; The constant below is 4E38. Use a 130 bit integer to hold that
+; number; 129-bits for the value + 1 bit for the sign.
+define float @overflow_uitofp() {
+  %i = uitofp i130 400000000000000000000000000000000000000 to float
+  ret float %i
+; CHECK-LABEL: @overflow_uitofp(
+; CHECK-NEXT: ret float undef 
+}
+
+define float @overflow_sitofp() {
+  %i = sitofp i130 400000000000000000000000000000000000000 to float
+  ret float %i
+; CHECK-LABEL: @overflow_sitofp(
+; CHECK-NEXT: ret float undef 
+}
+
+define i32 @PR21388(i32* %v) {
+  %icmp = icmp slt i32* %v, null
+  %sext = sext i1 %icmp to i32
+  ret i32 %sext
+; CHECK-LABEL: @PR21388(
+; CHECK-NEXT: %[[icmp:.*]] = icmp slt i32* %v, null
+; CHECK-NEXT: %[[sext:.*]] = sext i1 %[[icmp]] to i32
+; CHECK-NEXT: ret i32 %[[sext]]
+}
+
+define float @sitofp_zext(i16 %a) {
+; CHECK-LABEL: @sitofp_zext(
+; CHECK-NEXT: %[[sitofp:.*]] = uitofp i16 %a to float
+; CHECK-NEXT: ret float %[[sitofp]]
+  %zext = zext i16 %a to i32
+  %sitofp = sitofp i32 %zext to float
+  ret float %sitofp
+}
+
+define i1 @PR23309(i32 %A, i32 %B) {
+; CHECK-LABEL: @PR23309(
+; CHECK-NEXT: %[[sub:.*]] = sub i32 %A, %B
+; CHECK-NEXT: %[[and:.*]] = and i32 %[[sub]], 1
+; CHECK-NEXT: %[[cmp:.*]] = icmp ne i32 %[[and]], 0
+; CHECK-NEXT: ret i1 %[[cmp]]
+  %add = add i32 %A, -4
+  %sub = sub nsw i32 %add, %B
+  %trunc = trunc i32 %sub to i1
+  ret i1 %trunc
+}
+
+define i1 @PR23309v2(i32 %A, i32 %B) {
+; CHECK-LABEL: @PR23309v2(
+; CHECK-NEXT: %[[sub:.*]] = add i32 %A, %B
+; CHECK-NEXT: %[[and:.*]] = and i32 %[[sub]], 1
+; CHECK-NEXT: %[[cmp:.*]] = icmp ne i32 %[[and]], 0
+; CHECK-NEXT: ret i1 %[[cmp]]
+  %add = add i32 %A, -4
+  %sub = add nuw i32 %add, %B
+  %trunc = trunc i32 %sub to i1
+  ret i1 %trunc
+}