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61 lines
1.5 KiB
LLVM
61 lines
1.5 KiB
LLVM
; RUN: llc < %s -march=x86 | grep fldz
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; RUN: llc < %s -march=x86-64 | grep fld1
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; This is basically this code on x86-64:
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; _Complex long double test() { return 1.0; }
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define {x86_fp80, x86_fp80} @test() {
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%A = fpext double 1.0 to x86_fp80
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%B = fpext double 0.0 to x86_fp80
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ret x86_fp80 %A, x86_fp80 %B
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}
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;_test2:
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; fld1
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; fld %st(0)
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; ret
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define {x86_fp80, x86_fp80} @test2() {
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%A = fpext double 1.0 to x86_fp80
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ret x86_fp80 %A, x86_fp80 %A
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}
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; Uses both values.
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define void @call1(x86_fp80 *%P1, x86_fp80 *%P2) {
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%a = call {x86_fp80,x86_fp80} @test()
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%b = getresult {x86_fp80,x86_fp80} %a, 0
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store x86_fp80 %b, x86_fp80* %P1
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%c = getresult {x86_fp80,x86_fp80} %a, 1
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store x86_fp80 %c, x86_fp80* %P2
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ret void
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}
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; Uses both values, requires fxch
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define void @call2(x86_fp80 *%P1, x86_fp80 *%P2) {
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%a = call {x86_fp80,x86_fp80} @test()
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%b = getresult {x86_fp80,x86_fp80} %a, 1
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store x86_fp80 %b, x86_fp80* %P1
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%c = getresult {x86_fp80,x86_fp80} %a, 0
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store x86_fp80 %c, x86_fp80* %P2
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ret void
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}
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; Uses ST(0), ST(1) is dead but must be popped.
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define void @call3(x86_fp80 *%P1, x86_fp80 *%P2) {
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%a = call {x86_fp80,x86_fp80} @test()
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%b = getresult {x86_fp80,x86_fp80} %a, 0
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store x86_fp80 %b, x86_fp80* %P1
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ret void
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}
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; Uses ST(1), ST(0) is dead and must be popped.
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define void @call4(x86_fp80 *%P1, x86_fp80 *%P2) {
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%a = call {x86_fp80,x86_fp80} @test()
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%c = getresult {x86_fp80,x86_fp80} %a, 1
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store x86_fp80 %c, x86_fp80* %P2
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ret void
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}
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