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llvm-project/llvm/test/CodeGen/PowerPC/ia-neg-const.ll

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[PowerPC] Print all inline-asm consts as signed numbers Almost all immediates in PowerPC assembly (both 32-bit and 64-bit) are signed numbers, and it is important that we print them as such. To make sure that happens, we change PPCTargetLowering::LowerAsmOperandForConstraint so that it does all intermediate checks on a signed-extended int64_t value, and then creates the resulting target constant using MVT::i64. This will ensure that all negative values are printed as negative values (mirroring what is done in other backends to achieve the same sign-extension effect). This came up in the context of inline assembly like this: "add%I2 %0,%0,%2", ..., "Ir"(-1ll) where we used to print: addi 3,3,4294967295 and gcc would print: addi 3,3,-1 and gas accepts both forms, but our builtin assembler (correctly) does not. Now we print -1 like gcc does. While here, I replaced a bunch of custom integer checks with isInt<16> and friends from MathExtras.h. Thanks to Paul Hargrove for the bug report. llvm-svn: 223220
2014-12-03 17:37:50 +08:00
; RUN: llc -mcpu=pwr7 < %s | FileCheck %s
target datalayout = "E-m:e-i64:64-n32:64"
target triple = "powerpc64-unknown-linux-gnu"
@.str = private unnamed_addr constant [5 x i8] c"%ld\0A\00", align 1
; Function Attrs: nounwind
define i64 @main() #0 {
entry:
%x = alloca i64, align 8
store i64 0, i64* %x, align 8
%0 = call i64 asm sideeffect "ld $0,$1\0A\09add${2:I} $0,$0,$2", "=&r,*m,Ir"(i64* %x, i64 -1) #0
ret i64 %0
}
; CHECK: ld
Use the integrated assembler as default on PowerPC This was already done in clang, this commit now uses the integrated assembler as default when using LLVM tools directly. A number of test cases using inline asm had to be adapted, either by updating the expected output, or by using -no-integrated-as (for such tests that deliberately use an invalid instruction in inline asm). llvm-svn: 225819
2015-01-14 03:43:45 +08:00
; CHECK-NOT: addi 3, 3, 4294967295
; CHECK: addi 3, 3, -1
[PowerPC] Print all inline-asm consts as signed numbers Almost all immediates in PowerPC assembly (both 32-bit and 64-bit) are signed numbers, and it is important that we print them as such. To make sure that happens, we change PPCTargetLowering::LowerAsmOperandForConstraint so that it does all intermediate checks on a signed-extended int64_t value, and then creates the resulting target constant using MVT::i64. This will ensure that all negative values are printed as negative values (mirroring what is done in other backends to achieve the same sign-extension effect). This came up in the context of inline assembly like this: "add%I2 %0,%0,%2", ..., "Ir"(-1ll) where we used to print: addi 3,3,4294967295 and gcc would print: addi 3,3,-1 and gas accepts both forms, but our builtin assembler (correctly) does not. Now we print -1 like gcc does. While here, I replaced a bunch of custom integer checks with isInt<16> and friends from MathExtras.h. Thanks to Paul Hargrove for the bug report. llvm-svn: 223220
2014-12-03 17:37:50 +08:00
; CHECK: blr
; Function Attrs: nounwind
declare signext i32 @printf(i8* nocapture readonly, ...) #0
attributes #0 = { nounwind }