-; RUN: llc < %s -mtriple=i386-apple-darwin | FileCheck %s
+; RUN: llc < %s -mcpu=generic -mtriple=i386-apple-darwin | FileCheck %s
; There should be no stack manipulations between the inline asm and ret.
; CHECK: test1
; CHECK-NOT: fstp
; CHECK: ret
define void @test3(x86_fp80 %X) {
- call void asm sideeffect "frob ", "{st(0)},~{dirflag},~{fpsr},~{flags}"( x86_fp80 %X)
+ call void asm sideeffect "frob ", "{st(0)},~{st},~{dirflag},~{fpsr},~{flags}"( x86_fp80 %X)
ret void
}
; CHECK-NOT: fstp
; CHECK: ret
define void @test4(double %X) {
- call void asm sideeffect "frob ", "{st(0)},~{dirflag},~{fpsr},~{flags}"( double %X)
+ call void asm sideeffect "frob ", "{st(0)},~{st},~{dirflag},~{fpsr},~{flags}"( double %X)
ret void
}
; CHECK: ret
define void @test5(double %X) {
%Y = fadd double %X, 123.0
- call void asm sideeffect "frob ", "{st(0)},~{dirflag},~{fpsr},~{flags}"( double %Y)
+ call void asm sideeffect "frob ", "{st(0)},~{st},~{dirflag},~{fpsr},~{flags}"( double %Y)
ret void
}
ret void
}
+; PR4185
+; Passing a non-killed value to asm in {st}.
+; Make sure it is duped before.
+; asm kills st(0), so we shouldn't pop anything
+; CHECK: testPR4185
+; CHECK: fld %st(0)
+; CHECK: fistpl
+; CHECK-NOT: fstp
+; CHECK: fistpl
+; CHECK-NOT: fstp
+; CHECK: ret
+; A valid alternative would be to remat the constant pool load before each
+; inline asm.
+define void @testPR4185() {
+return:
+ call void asm sideeffect "fistpl $0", "{st},~{st}"(double 1.000000e+06)
+ call void asm sideeffect "fistpl $0", "{st},~{st}"(double 1.000000e+06)
+ ret void
+}
+
+; Passing a non-killed value through asm in {st}.
+; Make sure it is not duped before.
+; Second asm kills st(0), so we shouldn't pop anything
+; CHECK: testPR4185b
+; CHECK-NOT: fld %st(0)
+; CHECK: fistl
+; CHECK-NOT: fstp
+; CHECK: fistpl
+; CHECK-NOT: fstp
+; CHECK: ret
+; A valid alternative would be to remat the constant pool load before each
+; inline asm.
+define void @testPR4185b() {
+return:
+ call void asm sideeffect "fistl $0", "{st}"(double 1.000000e+06)
+ call void asm sideeffect "fistpl $0", "{st},~{st}"(double 1.000000e+06)
+ ret void
+}
+
+; PR4459
+; The return value from ceil must be duped before being consumed by asm.
+; CHECK: testPR4459
+; CHECK: ceil
+; CHECK: fld %st(0)
+; CHECK-NOT: fxch
+; CHECK: fistpl
+; CHECK-NOT: fxch
+; CHECK: fstpt
+; CHECK: test
+define void @testPR4459(x86_fp80 %a) {
+entry:
+ %0 = call x86_fp80 @ceil(x86_fp80 %a)
+ call void asm sideeffect "fistpl $0", "{st},~{st}"( x86_fp80 %0)
+ call void @test3(x86_fp80 %0 )
+ ret void
+}
+declare x86_fp80 @ceil(x86_fp80)
+
+; PR4484
+; test1 leaves a value on the stack that is needed after the asm.
+; CHECK: testPR4484
+; CHECK: test1
+; CHECK-NOT: fstp
+; Load %a from stack after ceil
+; CHECK: fldt
+; CHECK-NOT: fxch
+; CHECK: fistpl
+; CHECK-NOT: fstp
+; Set up call to test.
+; CHECK: fstpt
+; CHECK: test
+define void @testPR4484(x86_fp80 %a) {
+entry:
+ %0 = call x86_fp80 @test1()
+ call void asm sideeffect "fistpl $0", "{st},~{st}"(x86_fp80 %a)
+ call void @test3(x86_fp80 %0)
+ ret void
+}
+
+; PR4485
+; CHECK: testPR4485
+define void @testPR4485(x86_fp80* %a) {
+entry:
+ %0 = load x86_fp80* %a, align 16
+ %1 = fmul x86_fp80 %0, 0xK4006B400000000000000
+ %2 = fmul x86_fp80 %1, 0xK4012F424000000000000
+ tail call void asm sideeffect "fistpl $0", "{st},~{st}"(x86_fp80 %2)
+ %3 = load x86_fp80* %a, align 16
+ %4 = fmul x86_fp80 %3, 0xK4006B400000000000000
+ %5 = fmul x86_fp80 %4, 0xK4012F424000000000000
+ tail call void asm sideeffect "fistpl $0", "{st},~{st}"(x86_fp80 %5)
+ ret void
+}
+
+; An input argument in a fixed position is implicitly popped by the asm only if
+; the input argument is tied to an output register, or it is in the clobber list.
+; The clobber list case is tested above.
+;
+; This doesn't implicitly pop the stack:
+;
+; void fist1(long double x, int *p) {
+; asm volatile ("fistl %1" : : "t"(x), "m"(*p));
+; }
+;
+; CHECK: fist1
+; CHECK: fldt
+; CHECK: fistl (%e
+; CHECK: fstp
+; CHECK: ret
+define void @fist1(x86_fp80 %x, i32* %p) nounwind ssp {
+entry:
+ tail call void asm sideeffect "fistl $1", "{st},*m,~{memory},~{dirflag},~{fpsr},~{flags}"(x86_fp80 %x, i32* %p) nounwind
+ ret void
+}
+
+; Here, the input operand is tied to an output which means that is is
+; implicitly popped (and then the output is implicitly pushed).
+;
+; long double fist2(long double x, int *p) {
+; long double y;
+; asm ("fistl %1" : "=&t"(y) : "0"(x), "m"(*p) : "memory");
+; return y;
+; }
+;
+; CHECK: fist2
+; CHECK: fldt
+; CHECK: fistl (%e
+; CHECK-NOT: fstp
+; CHECK: ret
+define x86_fp80 @fist2(x86_fp80 %x, i32* %p) nounwind ssp {
+entry:
+ %0 = tail call x86_fp80 asm "fistl $2", "=&{st},0,*m,~{memory},~{dirflag},~{fpsr},~{flags}"(x86_fp80 %x, i32* %p) nounwind
+ ret x86_fp80 %0
+}
+
+; An 'f' constraint is never implicitly popped:
+;
+; void fucomp1(long double x, long double y) {
+; asm volatile ("fucomp %1" : : "t"(x), "f"(y) : "st");
+; }
+; CHECK: fucomp1
+; CHECK: fldt
+; CHECK: fldt
+; CHECK: fucomp %st
+; CHECK: fstp
+; CHECK-NOT: fstp
+; CHECK: ret
+define void @fucomp1(x86_fp80 %x, x86_fp80 %y) nounwind ssp {
+entry:
+ tail call void asm sideeffect "fucomp $1", "{st},f,~{st},~{dirflag},~{fpsr},~{flags}"(x86_fp80 %x, x86_fp80 %y) nounwind
+ ret void
+}
+
+; The 'u' constraint is only popped implicitly when clobbered:
+;
+; void fucomp2(long double x, long double y) {
+; asm volatile ("fucomp %1" : : "t"(x), "u"(y) : "st");
+; }
+;
+; void fucomp3(long double x, long double y) {
+; asm volatile ("fucompp %1" : : "t"(x), "u"(y) : "st", "st(1)");
+; }
+;
+; CHECK: fucomp2
+; CHECK: fldt
+; CHECK: fldt
+; CHECK: fucomp %st(1)
+; CHECK: fstp
+; CHECK-NOT: fstp
+; CHECK: ret
+;
+; CHECK: fucomp3
+; CHECK: fldt
+; CHECK: fldt
+; CHECK: fucompp %st(1)
+; CHECK-NOT: fstp
+; CHECK: ret
+define void @fucomp2(x86_fp80 %x, x86_fp80 %y) nounwind ssp {
+entry:
+ tail call void asm sideeffect "fucomp $1", "{st},{st(1)},~{st},~{dirflag},~{fpsr},~{flags}"(x86_fp80 %x, x86_fp80 %y) nounwind
+ ret void
+}
+define void @fucomp3(x86_fp80 %x, x86_fp80 %y) nounwind ssp {
+entry:
+ tail call void asm sideeffect "fucompp $1", "{st},{st(1)},~{st},~{st(1)},~{dirflag},~{fpsr},~{flags}"(x86_fp80 %x, x86_fp80 %y) nounwind
+ ret void
+}
+
+; One input, two outputs, one dead output.
+%complex = type { float, float }
+; CHECK: sincos1
+; CHECK: flds
+; CHECK-NOT: fxch
+; CHECK: sincos
+; CHECK-NOT: fstp
+; CHECK: fstp %st(1)
+; CHECK-NOT: fstp
+; CHECK: ret
+define float @sincos1(float %x) nounwind ssp {
+entry:
+ %0 = tail call %complex asm "sincos", "={st},={st(1)},0,~{dirflag},~{fpsr},~{flags}"(float %x) nounwind
+ %asmresult = extractvalue %complex %0, 0
+ ret float %asmresult
+}
+
+; Same thing, swapped output operands.
+; CHECK: sincos2
+; CHECK: flds
+; CHECK-NOT: fxch
+; CHECK: sincos
+; CHECK-NOT: fstp
+; CHECK: fstp %st(1)
+; CHECK-NOT: fstp
+; CHECK: ret
+define float @sincos2(float %x) nounwind ssp {
+entry:
+ %0 = tail call %complex asm "sincos", "={st(1)},={st},1,~{dirflag},~{fpsr},~{flags}"(float %x) nounwind
+ %asmresult = extractvalue %complex %0, 1
+ ret float %asmresult
+}
+
+; Clobber st(0) after it was live-out/dead from the previous asm.
+; CHECK: sincos3
+; Load x, make a copy for the second asm.
+; CHECK: flds
+; CHECK: fld %st(0)
+; CHECK: sincos
+; Discard dead result in st(0), bring x to the top.
+; CHECK: fstp %st(0)
+; CHECK: fxch
+; x is now in st(0) for the second asm
+; CHECK: sincos
+; Discard both results.
+; CHECK: fstp
+; CHECK: fstp
+; CHECK: ret
+define float @sincos3(float %x) nounwind ssp {
+entry:
+ %0 = tail call %complex asm sideeffect "sincos", "={st(1)},={st},1,~{dirflag},~{fpsr},~{flags}"(float %x) nounwind
+ %1 = tail call %complex asm sideeffect "sincos", "={st(1)},={st},1,~{dirflag},~{fpsr},~{flags}"(float %x) nounwind
+ %asmresult = extractvalue %complex %0, 0
+ ret float %asmresult
+}
+
+; Pass the same value in two fixed stack slots.
+; CHECK: PR10602
+; CHECK: flds LCPI
+; CHECK: fld %st(0)
+; CHECK: fcomi %st(1), %st(0)
+define i32 @PR10602() nounwind ssp {
+entry:
+ %0 = tail call i32 asm "fcomi $2, $1; pushf; pop $0", "=r,{st},{st(1)},~{dirflag},~{fpsr},~{flags}"(double 2.000000e+00, double 2.000000e+00) nounwind
+ ret i32 %0
+}
projects / oota-llvm.git / blobdiff