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513db043c7
In PIC mode, the registers R14, R15 and R28 are reserved for use by the PLT handling code. This causes all functions to clobber these registers. While this is not new for regular function calls, it does also apply to save/restore functions, which do not follow the standard ABI conventions with respect to the volatile/non-volatile registers. Patch by Jyotsna Verma. llvm-svn: 264324
70 lines
3.5 KiB
LLVM
70 lines
3.5 KiB
LLVM
; RUN: llc -march=hexagon -relocation-model=pic < %s | FileCheck %s
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; Force the use of R14 (by clobbering everything else in the inline asm).
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; Make sure that R14 is not set before the __save call (which will clobber
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; R14, R15 and R28).
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; CHECK: call __save_r16_through_r27
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; CHECK: }
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; CHECK: r14{{ *}}=
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@.str = private unnamed_addr constant [4 x i8] c"%d\0A\00", align 1
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; Function Attrs: nounwind optsize
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define i32 @_Z7testR14Pi(i32* nocapture %res) #0 {
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entry:
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%0 = load i32, i32* %res, align 4
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%1 = tail call { i32, i32 } asm "r0=$2\0A\09$1=add(r0,#$3)\0A\09$0=add(r0,#$4)\0A\09", "=r,=r,r,i,i,~{r0},~{r1},~{r2},~{r3},~{r4},~{r5},~{r6},~{r7},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r15},~{r16},~{r17},~{r18},~{r19},~{r20},~{r21},~{r22},~{r23},~{r24},~{r25},~{r26},~{r27}"(i32 %0, i32 40, i32 50) #1
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%asmresult = extractvalue { i32, i32 } %1, 0
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%asmresult1 = extractvalue { i32, i32 } %1, 1
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store i32 %asmresult, i32* %res, align 4
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%call = tail call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i32 0, i32 0), i32 %asmresult1) #2
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%2 = load i32, i32* %res, align 4
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%call2 = tail call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i32 0, i32 0), i32 %2) #2
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ret i32 0
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}
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; Function Attrs: nounwind optsize
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declare i32 @printf(i8*, ...) #0
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; Same as above for R15.
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; CHECK: call __save_r16_through_r27
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; CHECK: }
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; CHECK: r15{{ *}}=
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; Function Attrs: nounwind optsize
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define i32 @_Z7testR15Pi(i32* nocapture %res) #0 {
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entry:
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%0 = load i32, i32* %res, align 4
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%1 = tail call { i32, i32 } asm "r0=$2\0A\09$1=add(r0,#$3)\0A\09$0=add(r0,#$4)\0A\09", "=r,=r,r,i,i,~{r0},~{r1},~{r2},~{r3},~{r4},~{r5},~{r6},~{r7},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r16},~{r17},~{r18},~{r19},~{r20},~{r21},~{r22},~{r23},~{r24},~{r25},~{r26},~{r27}"(i32 %0, i32 40, i32 50) #1
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%asmresult = extractvalue { i32, i32 } %1, 0
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%asmresult1 = extractvalue { i32, i32 } %1, 1
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store i32 %asmresult, i32* %res, align 4
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%call = tail call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i32 0, i32 0), i32 %asmresult1) #2
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%2 = load i32, i32* %res, align 4
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%call2 = tail call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i32 0, i32 0), i32 %2) #2
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ret i32 0
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}
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; Same as above for R28.
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; CHECK: call __save_r16_through_r27
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; CHECK: }
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; CHECK: r28{{ *}}=
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; Function Attrs: nounwind optsize
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define i32 @_Z7testR28Pi(i32* nocapture %res) #0 {
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entry:
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%0 = load i32, i32* %res, align 4
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%1 = tail call { i32, i32 } asm "r0=$2\0A\09$1=add(r0,#$3)\0A\09$0=add(r0,#$4)\0A\09", "=r,=r,r,i,i,~{r0},~{r1},~{r2},~{r3},~{r4},~{r5},~{r6},~{r7},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15},~{r16},~{r17},~{r18},~{r19},~{r20},~{r21},~{r22},~{r23},~{r24},~{r25},~{r26}"(i32 %0, i32 40, i32 50) #1
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%asmresult = extractvalue { i32, i32 } %1, 0
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%asmresult1 = extractvalue { i32, i32 } %1, 1
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store i32 %asmresult, i32* %res, align 4
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%call = tail call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i32 0, i32 0), i32 %asmresult1) #2
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%2 = load i32, i32* %res, align 4
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%call2 = tail call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i32 0, i32 0), i32 %2) #2
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ret i32 0
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}
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attributes #0 = { nounwind optsize "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #1 = { nounwind }
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attributes #2 = { nounwind optsize }
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