X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=test%2FTransforms%2FInstCombine%2Fcast.ll;h=3c2f28116e3fb1df7886f44e58c8984743c159fc;hb=c04d3d37e438da359d3f595ea0a892c052e507f9;hp=82b5c213a0e90edbeab1beaa809fa6edcbe9743c;hpb=c7f9637a9d6359a3898531e7266fcb370da770c1;p=oota-llvm.git

diff --git a/test/Transforms/InstCombine/cast.ll b/test/Transforms/InstCombine/cast.ll
index 82b5c213a0e..3c2f28116e3 100644
--- a/test/Transforms/InstCombine/cast.ll
+++ b/test/Transforms/InstCombine/cast.ll
@@ -1,27 +1,383 @@
 ; Tests to make sure elimination of casts is working correctly
+; RUN: opt < %s -instcombine -S | FileCheck %s
+target datalayout = "E-p:64:64:64-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128-n8:16:32:64"
 
-; RUN: if as < %s | opt -instcombine -dce | grep '%c' | grep cast
-; RUN: then exit 1
-; RUN: else exit 0
-; RUN: fi
+@inbuf = external global [32832 x i8]           ; <[32832 x i8]*> [#uses=1]
 
-implementation
+define i32 @test1(i32 %A) {
+        %c1 = bitcast i32 %A to i32             ; <i32> [#uses=1]
+        %c2 = bitcast i32 %c1 to i32            ; <i32> [#uses=1]
+        ret i32 %c2
+; CHECK: ret i32 %A
+}
+
+define i64 @test2(i8 %A) {
+        %c1 = zext i8 %A to i16         ; <i16> [#uses=1]
+        %c2 = zext i16 %c1 to i32               ; <i32> [#uses=1]
+        %Ret = zext i32 %c2 to i64              ; <i64> [#uses=1]
+        ret i64 %Ret
+; CHECK: %Ret = zext i8 %A to i64
+; CHECK: ret i64 %Ret
+}
+
+; This function should just use bitwise AND
+define i64 @test3(i64 %A) {
+        %c1 = trunc i64 %A to i8                ; <i8> [#uses=1]
+        %c2 = zext i8 %c1 to i64                ; <i64> [#uses=1]
+        ret i64 %c2
+; CHECK: %c2 = and i64 %A, 255
+; CHECK: ret i64 %c2
+}
+
+define i32 @test4(i32 %A, i32 %B) {
+        %COND = icmp slt i32 %A, %B             ; <i1> [#uses=1]
+        ; Booleans are unsigned integrals
+        %c = zext i1 %COND to i8                ; <i8> [#uses=1]
+        ; for the cast elim purpose
+        %result = zext i8 %c to i32             ; <i32> [#uses=1]
+        ret i32 %result
+; CHECK: %COND = icmp slt i32 %A, %B
+; CHECK: %result = zext i1 %COND to i32
+; CHECK: ret i32 %result
+}
+
+define i32 @test5(i1 %B) {
+        ; This cast should get folded into
+        %c = zext i1 %B to i8           ; <i8> [#uses=1]
+        ; this cast        
+        %result = zext i8 %c to i32             ; <i32> [#uses=1]
+        ret i32 %result
+; CHECK: %result = zext i1 %B to i32
+; CHECK: ret i32 %result
+}
+
+define i32 @test6(i64 %A) {
+        %c1 = trunc i64 %A to i32               ; <i32> [#uses=1]
+        %res = bitcast i32 %c1 to i32           ; <i32> [#uses=1]
+        ret i32 %res
+; CHECK: %res = trunc i64 %A to i32
+; CHECK: ret i32 %res
+}
+
+define i64 @test7(i1 %A) {
+        %c1 = zext i1 %A to i32         ; <i32> [#uses=1]
+        %res = sext i32 %c1 to i64              ; <i64> [#uses=1]
+        ret i64 %res
+; CHECK: %res = zext i1 %A to i64
+; CHECK: ret i64 %res
+}
+
+define i64 @test8(i8 %A) {
+        %c1 = sext i8 %A to i64         ; <i64> [#uses=1]
+        %res = bitcast i64 %c1 to i64           ; <i64> [#uses=1]
+        ret i64 %res
+; CHECK: %res = sext i8 %A to i64
+; CHECK: ret i64 %res
+}
+
+define i16 @test9(i16 %A) {
+        %c1 = sext i16 %A to i32                ; <i32> [#uses=1]
+        %c2 = trunc i32 %c1 to i16              ; <i16> [#uses=1]
+        ret i16 %c2
+; CHECK: ret i16 %A
+}
+
+define i16 @test10(i16 %A) {
+        %c1 = sext i16 %A to i32                ; <i32> [#uses=1]
+        %c2 = trunc i32 %c1 to i16              ; <i16> [#uses=1]
+        ret i16 %c2
+; CHECK: ret i16 %A
+}
+
+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 )
+        ret void
+; CHECK: call void (i32, ...)* @varargs(i32 5, i32* %P)
+; CHECK: ret void
+}
+
+define i32* @test12() {
+        %p = malloc [4 x i8]            ; <[4 x i8]*> [#uses=1]
+        %c = bitcast [4 x i8]* %p to i32*               ; <i32*> [#uses=1]
+        ret i32* %c
+; CHECK: %malloccall = tail call i8* @malloc(i32 4)
+; CHECK: ret i32* %c
+}
+
+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]
+        ret i8* %c
+; CHECK: %c = getelementptr [32832 x i8]* @inbuf, i64 0, i64 %A
+; CHECK: ret i8* %c
+}
+
+define i1 @test14(i8 %A) {
+        %c = bitcast i8 %A to i8                ; <i8> [#uses=1]
+        %X = icmp ult i8 %c, -128               ; <i1> [#uses=1]
+        ret i1 %X
+; CHECK: %X = icmp sgt i8 %A, -1
+; CHECK: ret i1 %X
+}
+
+
+; This just won't occur when there's no difference between ubyte and sbyte
+;bool %test15(ubyte %A) {
+;        %c = cast ubyte %A to sbyte
+;        %X = setlt sbyte %c, 0   ; setgt %A, 127
+;        ret bool %X
+;}
+
+define i1 @test16(i32* %P) {
+        %c = icmp ne i32* %P, null              ; <i1> [#uses=1]
+        ret i1 %c
+; CHECK: %c = icmp ne i32* %P, null
+; CHECK: ret i1 %c
+}
+
+define i16 @test17(i1 %tmp3) {
+        %c = zext i1 %tmp3 to i32               ; <i32> [#uses=1]
+        %t86 = trunc i32 %c to i16              ; <i16> [#uses=1]
+        ret i16 %t86
+; CHECK: %t86 = zext i1 %tmp3 to i16
+; CHECK: ret i16 %t86
+}
+
+define i16 @test18(i8 %tmp3) {
+        %c = sext i8 %tmp3 to i32               ; <i32> [#uses=1]
+        %t86 = trunc i32 %c to i16              ; <i16> [#uses=1]
+        ret i16 %t86
+; CHECK: %t86 = sext i8 %tmp3 to i16
+; CHECK: ret i16 %t86
+}
+
+define i1 @test19(i32 %X) {
+        %c = sext i32 %X to i64         ; <i64> [#uses=1]
+        %Z = icmp slt i64 %c, 12345             ; <i1> [#uses=1]
+        ret i1 %Z
+; CHECK: %Z = icmp slt i32 %X, 12345
+; CHECK: ret i1 %Z
+}
+
+define i1 @test20(i1 %B) {
+        %c = zext i1 %B to i32          ; <i32> [#uses=1]
+        %D = icmp slt i32 %c, -1                ; <i1> [#uses=1]
+        ;; false
+        ret i1 %D
+; CHECK: ret i1 false
+}
 
-int %test1(int %A) {
-	%c1 = cast int %A to uint
-	%c2 = cast uint %c1 to int
-	ret int %c2
+define i32 @test21(i32 %X) {
+        %c1 = trunc i32 %X to i8                ; <i8> [#uses=1]
+        ;; sext -> zext -> and -> nop
+        %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
 }
 
-ulong %test2(ubyte %A) {
-	%c1 = cast ubyte %A to ushort
-	%c2 = cast ushort %c1 to uint
-	%Ret = cast uint %c2 to ulong
-	ret ulong %Ret
+define i32 @test22(i32 %X) {
+        %c1 = trunc i32 %X to i8                ; <i8> [#uses=1]
+        ;; sext -> zext -> and -> nop
+        %c2 = sext i8 %c1 to i32                ; <i32> [#uses=1]
+        %RV = shl i32 %c2, 24           ; <i32> [#uses=1]
+        ret i32 %RV
+; CHECK: %RV = shl i32 %X, 24
+; CHECK: ret i32 %RV
 }
 
-ulong %test3(ulong %A) {    ; This function should just use bitwise AND
-	%c1 = cast ulong %A to ubyte
-	%c2 = cast ubyte %c1 to ulong
-	ret ulong %c2
+define i32 @test23(i32 %X) {
+        ;; Turn into an AND even though X
+        %c1 = trunc i32 %X to i16               ; <i16> [#uses=1]
+        ;; and Z are signed.
+        %c2 = zext i16 %c1 to i32               ; <i32> [#uses=1]
+        ret i32 %c2
+; CHECK: %c2 = and i32 %X, 65535
+; CHECK: ret i32 %c2
 }
+
+define i1 @test24(i1 %C) {
+        %X = select i1 %C, i32 14, i32 1234             ; <i32> [#uses=1]
+        ;; Fold cast into select
+        %c = icmp ne i32 %X, 0          ; <i1> [#uses=1]
+        ret 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]
+        %D = fptosi double %c to i32            ; <i32> [#uses=1]
+        ret i32 %D
+; CHECK: %D = fptosi float %F to i32
+; CHECK: ret i32 %D
+}
+
+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: 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: ret float* %c
+}
+
+define i32 @test29(i32 %c1, i32 %c2) {
+        %tmp1 = trunc i32 %c1 to i8             ; <i8> [#uses=1]
+        %tmp4.mask = trunc i32 %c2 to i8                ; <i8> [#uses=1]
+        %tmp = or i8 %tmp4.mask, %tmp1          ; <i8> [#uses=1]
+        %tmp10 = zext i8 %tmp to i32            ; <i32> [#uses=1]
+        ret i32 %tmp10
+; CHECK: %tmp2 = or i32 %c2, %c1
+; CHECK: %tmp10 = and i32 %tmp2, 255
+; CHECK: ret i32 %tmp10
+}
+
+define i32 @test30(i32 %c1) {
+        %c2 = trunc i32 %c1 to i8               ; <i8> [#uses=1]
+        %c3 = xor i8 %c2, 1             ; <i8> [#uses=1]
+        %c4 = zext i8 %c3 to i32                ; <i32> [#uses=1]
+        ret i32 %c4
+; CHECK: %c3 = and i32 %c1, 255
+; CHECK: %c4 = xor i32 %c3, 1
+; CHECK: ret i32 %c4
+}
+
+define i1 @test31(i64 %A) {
+        %B = trunc i64 %A to i32                ; <i32> [#uses=1]
+        %C = and i32 %B, 42             ; <i32> [#uses=1]
+        %D = icmp eq i32 %C, 10         ; <i1> [#uses=1]
+        ret i1 %D
+; CHECK: %C1 = and i64 %A, 42
+; CHECK: %D = icmp eq i64 %C1, 10
+; CHECK: ret i1 %D
+}
+
+define void @test32(double** %tmp) {
+        %tmp8 = malloc [16 x i8]                ; <[16 x i8]*> [#uses=1]
+        %tmp8.upgrd.1 = bitcast [16 x i8]* %tmp8 to double*             ; <double*> [#uses=1]
+        store double* %tmp8.upgrd.1, double** %tmp
+        ret void
+; CHECK: %malloccall = tail call i8* @malloc(i32 16)
+; CHECK: %tmp8.upgrd.1 = bitcast i8* %malloccall to double*
+; CHECK: store double* %tmp8.upgrd.1, double** %tmp
+; CHECK: ret void
+}
+
+define i32 @test33(i32 %c1) {
+        %x = bitcast i32 %c1 to float           ; <float> [#uses=1]
+        %y = bitcast float %x to i32            ; <i32> [#uses=1]
+        ret i32 %y
+; CHECK: ret i32 %c1
+}
+
+define i16 @test34(i16 %a) {
+        %c1 = zext i16 %a to i32                ; <i32> [#uses=1]
+        %tmp21 = lshr i32 %c1, 8                ; <i32> [#uses=1]
+        %c2 = trunc i32 %tmp21 to i16           ; <i16> [#uses=1]
+        ret i16 %c2
+; CHECK: %tmp21 = lshr i16 %a, 8
+; CHECK: ret i16 %tmp21
+}
+
+define i16 @test35(i16 %a) {
+        %c1 = bitcast i16 %a to i16             ; <i16> [#uses=1]
+        %tmp2 = lshr i16 %c1, 8         ; <i16> [#uses=1]
+        %c2 = bitcast i16 %tmp2 to i16          ; <i16> [#uses=1]
+        ret i16 %c2
+; CHECK: %tmp2 = lshr i16 %a, 8
+; CHECK: ret i16 %tmp2
+}
+
+; icmp sgt i32 %a, -1
+; rdar://6480391
+define i1 @test36(i32 %a) {
+        %b = lshr i32 %a, 31
+        %c = trunc i32 %b to i8
+        %d = icmp eq i8 %c, 0
+        ret i1 %d
+; CHECK: %d = icmp sgt i32 %a, -1
+; CHECK: ret i1 %d
+}
+
+; ret i1 false
+define i1 @test37(i32 %a) {
+        %b = lshr i32 %a, 31
+        %c = or i32 %b, 512
+        %d = trunc i32 %c to i8
+        %e = icmp eq i8 %d, 11
+        ret i1 %e
+; CHECK: ret i1 false
+}
+
+define i64 @test38(i32 %a) {
+	%1 = icmp eq i32 %a, -2
+	%2 = zext i1 %1 to i8
+	%3 = xor i8 %2, 1
+	%4 = zext i8 %3 to i64
+        ret i64 %4
+; CHECK: %1 = icmp ne i32 %a, -2
+; CHECK: %2 = zext i1 %1 to i64
+; CHECK: ret i64 %2
+}
+
+define i16 @test39(i16 %a) {
+        %tmp = zext i16 %a to i32
+        %tmp21 = lshr i32 %tmp, 8
+        %tmp5 = shl i32 %tmp, 8
+        %tmp.upgrd.32 = or i32 %tmp21, %tmp5
+        %tmp.upgrd.3 = trunc i32 %tmp.upgrd.32 to i16
+        ret i16 %tmp.upgrd.3
+; CHECK: @test39
+; CHECK: %tmp.upgrd.32 = call i16 @llvm.bswap.i16(i16 %a)
+; CHECK: ret i16 %tmp.upgrd.32
+}
+
+define i16 @test40(i16 %a) {
+        %tmp = zext i16 %a to i32
+        %tmp21 = lshr i32 %tmp, 9
+        %tmp5 = shl i32 %tmp, 8
+        %tmp.upgrd.32 = or i32 %tmp21, %tmp5
+        %tmp.upgrd.3 = trunc i32 %tmp.upgrd.32 to i16
+        ret i16 %tmp.upgrd.3
+; CHECK: @test40
+; CHECK: %tmp21 = lshr i16 %a, 9
+; CHECK: %tmp5 = shl i16 %a, 8
+; CHECK: %tmp.upgrd.32 = or i16 %tmp21, %tmp5
+; CHECK: ret i16 %tmp.upgrd.32
+}
+
+; PR1263
+define i32* @test41(i32* %tmp1) {
+        %tmp64 = bitcast i32* %tmp1 to { i32 }*
+        %tmp65 = getelementptr { i32 }* %tmp64, i32 0, i32 0
+        ret i32* %tmp65
+; CHECK: @test41
+; CHECK: ret i32* %tmp1
+}
+
+define i32 @test42(i32 %X) {
+        %Y = trunc i32 %X to i8         ; <i8> [#uses=1]
+        %Z = zext i8 %Y to i32          ; <i32> [#uses=1]
+        ret i32 %Z
+; CHECK: @test42
+; CHECK: %Z = and i32 %X, 255
+}
+